SIPSorcery.SIP.SIPTransaction.SendInformationalResponse C# (CSharp) Method

        public virtual void SendInformationalResponse(SIPResponse sipResponse)
        {
            FireTransactionTraceMessage("Send Info Response " + LocalSIPEndPoint.ToString() + "->" + this.RemoteEndPoint + m_crLF + sipResponse.ToString());

            if (sipResponse.StatusCode == 100)
            {
                UpdateTransactionState(SIPTransactionStatesEnum.Trying);
            }
            else if (sipResponse.StatusCode > 100 && sipResponse.StatusCode <= 199)
            {
                UpdateTransactionState(SIPTransactionStatesEnum.Proceeding);
            }

            m_sipTransport.SendResponse(sipResponse);
        }